Hi Michael,

FWIW. gcc-4.3.3 compiles SimpleTutorial.cpp just fine but has issues with SimpleTutorialEuml.cpp. Pages and pages of a compiler babble about boost::fusion::void_ and mpl_::na.

Should I not be using boot 1.41?

I just tried the version with old syntax and with the new one, with gcc-4.4 and boost 1.41 and got no warning, even in pedantic mode (excluding a few in boost/integer_traits.hpp), so I'm scratching my head. Christophe